Jurassic Park 3D opens in theaters tomorrow, which has many fans getting all nostalgic about what Steven Spielberg‘s 1993 masterpiece means to them. The release has also given us an oppurtunity to look back at the film’s ground-breaking effects and read stories from some of its cast and crew. It’s that last one that’s revealed a small detail about Colin Trevorrow‘s Jurassic Park 4.

USA Today spoke to paleontologist Jack Horner, who was the real life Alan Grant for the film, serving as dinosaur advisor. He’s been hired to work on the fourth film and told the paper a previously unseen dinosaur will be at the center of the sequel. Read his quote below.

Here’s what Horner had to say to USA Today (via CS) about this mysterious new dinosaur:

I can’t actually tell you who that will be, but you’ll want to keep the lights on after you see this movie.

What many people tend to forget is, until Jurassic Park, almost no one had heard of a velociraptor. It was just another dinosaur on a long list of long-gone beasts. But Michael Crichton put it in his book, and it was brought to life through the genius of Spielberg’s direction and the effects team headed by Stan Winston, Phil Tippett, Michael Lantieri, and Dennis Muren. Thanks to the film, the velociraptor became one of the most popular dinosaurs out there. Behind the Tyrannosaurs Rex, of course.

It sounds like Trevorrow, along with screenwriters Rick Jaffa and Amanda Silver, have something similar planned for this film, which still has the very optimistic release date of June 13, 2014.

Any dino fans out there? Which new dinosaurs can inspire fear like the raptor once did?